111012221212112 has 160 divisors (see below), whose sum is σ = 261531034692480. Its totient is φ = 44989989027840.

The previous prime is 111012221212111. The next prime is 111012221212117. The reversal of 111012221212112 is 211212122210111.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111012221212111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1519908458 + ... + 1519981494.

It is an arithmetic number, because the mean of its divisors is an integer number (1634568966828).

Almost surely, 2^{111012221212112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111012221212112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130765517346240).

111012221212112 is an abundant number, since it is smaller than the sum of its proper divisors (150518813480368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111012221212112 is a wasteful number, since it uses less digits than its factorization.

111012221212112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99829 (or 99823 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 111012221212112 its reverse (211212122210111), we get a palindrome (322224343422223).

The spelling of 111012221212112 in words is "one hundred eleven trillion, twelve billion, two hundred twenty-one million, two hundred twelve thousand, one hundred twelve".